$\sin\left(3a\right)\cos\left(a\right)-\cos\left(3a\right)\sec\left(a\right)$

$\frac{d}{dx}\left(\tan\left(x\right)^{\sin^2\left(x\right)}\right)$

$2\cos\left(x+\frac{\pi}{2}\right)+\sin\left(x\right)=1$

$\left(x^2-1\right)y\left(\frac{dy}{dx}\right)+x=0$

$\left(\sqrt{6b^3}\right)\left(\sqrt{8b}\right)$

$e^{-2y}=-2\left(c+\frac{1}{3}e^{3x}\right)$

$\int\frac{3y+6}{y^2+4y}dx$